Summary This paper presents a finite element topology optimization framework for the design of two‐phase structural systems considering contact and cohesion phenomena along interface. The geometry material interface is described by an explicit level set method, response predicted extended method. In this work, condition bilinear cohesive zone model on basis traction‐separation constitutive relation. non‐penetration in presence compressive forces enforced stabilized Lagrange multiplier...

This paper presents a finite element methodology for numerical modeling the evolution of damage in Solid-State Lithium-Ion Batteries (SSLIBs). process is dominated by interaction electrochemical and mechanical phenomena electrode, solid-state electrolyte, electrode/electrolyte interface. These depend on transport species/ions, deformations, electrostatics, reactions. Damage electrode active material, caused diffusion-induced stresses, described non-local model. To model influence ion/species...

This paper presents a topology optimization framework for structural problems subjected to transient loading. The mechanical model assumes linear elastic isotropic material, infinitesimal strains, and dynamic response. problem is solved using the gradient-based optimizer Method of Moving Asymptotes (MMA) with time-dependent sensitivities provided via adjoint method. stiffness materials interpolated Solid Isotropic Material Penalization (SIMP) method Heaviside Projection (HPM) used stabilize...

We present a multi-scale finite element model to study damage evolution in electrode active particles. The electrochemical and mechanical phenomena the separator porous electrode, composed of solid materials liquid electrolyte, are described by model. particles, caused diffusion-induced stresses, is non-local To influence on transport properties performance battery, diffusivity particles terms parameters. results numerical studies suggest that causes significant capacity fade reduction...

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In this study, we show that mechanochemical activation in responsive materials with designed, periodic microstructures can be achieved at lower applied strains than their bulk counterparts.

In the past twenty years, sustainable development has become a challenging subject across many scientific fields. With built environment as major component of societies, construction been main player in whole sustainability mentality. To emphasize on importance incorporating to seismic retrofitting, three different retrofitting methods (base isolation, concrete jacketing, and steel jacketing) are evaluated for typical 4-story RC school building under 1994 Northridge earthquake’s ground...

Equivalent linear ground response analysis is conducted to evaluate seismic site effects in Tehran, Iran. Recorded bedrock motions acceleration stations within Tehran are scaled based on the peak distribution map for a 475-year return period. The responses of sites categorised as class C, Building Seismic Safety Council classification system, obtained using equivalent and available geotechnical geophysical data. results presented terms spectra amplification factors, computed period ranges...

This paper presents a continuum formulation for thermo-viscoelastic behavior of fully saturated porous media. Two-phase mixture with solid and fluid phases is considered. Governing balance equations the mixture, including mass, linear momentum energy are presented. The displacement skeleton, pore pressure, temperature considered as independent state variables. stress-strain relationship skeleton described by viscoelastic model. flow Darcy's law. Numerical examples presented to show performance

Abstract High‐dimensional models typically require a large computational overhead for multiphysics applications, which hamper their use broad‐sweeping domain interrogation. Herein, we develop modeling framework to capture the through‐plane fluid dynamic response of electrodes and flow fields in redox cell, generating computationally inexpensive two‐dimensional (2D) model. We leverage depth‐averaging approach that also accounts variations out‐of‐plane motion departures from Darcy's law arise...

This paper presents a new approach to study the effects of temperature on poro- elastic and viscoelastic behavior articular cartilage. Biphasic solid-fluid mixture theory is applied poro-mechancial cartilage in fully saturated state. The balance linear momentum, mass, energy are considered describe deformation solid skeleton, pore fluid pressure, distribution mixture. mechanical model assumes both isotropic materials, infinitesimal strain theory, time-dependent response. influence modeled...

This paper presents empirical seismic site effect analysis for Tehran city, the capital of Iran. Empirical methods using both spectral ratio horizontal components sedimentary to rocky (Hs/Hr) (site/reference) and vertical (H / V) are considered. To estimate parameters methods, recorded motions from Firozabad-Kojour (2004) Kahak-Qom (2007) earthquakes analysed. The in stations used Hs/Hr method. Site amplification ratios various frequency ranges extracted results H V methods. peak surface...

We present a multi-scale finite element model to study the evolution of non-local damage in electrode active materials. The electrochemical and mechanical phenomena separator, porous with solid materials liquid electrolyte are described through modeling approach. Our accounts for interactions between different physical at computational scales. Three length scales distinguished our model: macro-scale, entire battery cell characterized transport Li + , electric potential phases, macroscopic...

This paper extends a recently developed adjoint framework for an efficient overhang filtering to projection-based methods constraints. The approach offers fast and computational methodology enables minimum allowable self-supporting angle feature size within the formulation of optimization problem, designs components that can be manufactured without using support structures. adjoint-based sensitivity are derived eliminate intensities associated with direct differentiation in constraints,...